fix(british-english): adds british english spelling for english-medical.json (@AlexRusbridge) (#7278)

### Description

Adds British English spelling for words found in the english-medical
word list.

- Hematology terms (`hemo-`/`hema-` -> `haemo-`/`haema-`)
- Blood condition suffixes (`-emia` -> `-aemia`)
- White blood cell terms (`leuko-` -> `leuco-`)
- Respiratory terms (`-pnea` -> `-pnoea`)
- Other notable conversions (common patterns like `-ize` and other
cases)

### Checks

- [ ] ~Adding/modifying Typescript code?~
- [ ] ~Adding quotes?comment) so we can verify their content.~
- [ ] ~Adding a language?~
- [ ] ~Adding a theme?~
- [ ] ~Adding a layout?~
- [ ] ~Adding a font?~
- [x] Check if any open issues are related to this PR; if so, be sure to
tag them below.
- [x] Make sure the PR title follows the Conventional Commits standard.
(https://www.conventionalcommits.org for more info)
- [x] Make sure to include your GitHub username prefixed with @ inside
parentheses at the end of the PR title.

---------

Co-authored-by: Jack <jack@monkeytype.com>

frontend/src/ts/test/british-english.ts

@@ -652,6 +652,33 @@ const replacementRules: BritishEnglishReplacements = {
   moisturizing: "moisturising",
   favoring: "favouring",
   marvelous: "marvellous",
+  hematuria: "haematuria",
+  hemoptysis: "haemoptysis",
+  hemorrhoid: "haemorrhoid",
+  hemorrhagic: "haemorrhagic",
+  hypercalcemia: "hypercalcaemia",
+  hyperglycemia: "hyperglycaemia",
+  hypoglycemia: "hypoglycaemia",
+  toxemia: "toxaemia",
+  hypoxemia: "hypoxaemia",
+  bacteremia: "bacteraemia",
+  hypernatremia: "hypernatraemia",
+  hyponatremia: "hyponatraemia",
+  leukocytosis: "leucocytosis",
+  leukocyte: "leucocyte",
+  leukopenia: "leucopenia",
+  apnea: "apnoea",
+  bradypnea: "bradypnoea",
+  tachypnea: "tachypnoea",
+  orthopnea: "orthopnoea",
+  ileocecal: "ileocaecal",
+  metastasize: "metastasise",
+  lymphedema: "lymphoedema",
+  neuron: "neurone",
+  hemianopsia: "hemianopia",
+  galactorrhea: "galactorrhoea",
+  nebulizer: "nebuliser",
+  paresthesia: "paraesthesia",
 };
 
 export async function replace(